As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
APU GEN FAULT WOULD NOT RESET. FOUND OPEN LINE BETWEEN APU GENERATOR PINS A/7 AND A/1. REMOVED APU GEN IAW AMM 24-23. INSTALLED NEW APU GENERATOR IAW AMM 24-23-51. CHECKED OIL FILTERS, NO DEBRIS FOUND. REINSTALLED ORIGINAL FILTERS IAW AMM 24-23-51. RAN APU & LEAK CHECKED OK. OK FOR SERVICE.